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US2551231A
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US
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Frame for coupling two tractors in laterally spaced relation and for mounting the tractor controls thereon
Assignee: Individual
•
Filing: 1948-12-02
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Granted: 1951-05-01
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Expires: 1968-12-02
Abstract
No abstract record available.
Inventors
- 👤 Roy N Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:36
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/0621; B62D49/0642
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1310604A
Cited
US1158680A
Cited
US1430251A
Cited
US1798351A
Cited
US2168706A
Cited
US2262877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |